郑州市地面沉降监测基岩标施工技术  

Construction Technology of Bedrock Mark for Ground Subsidence Monitoring in Zhengzhou

作　　者：王刚[1] 李莹 黄烜[1] 于丽 WANG Gang;LI Ying;HUANG Xuan;YU Li(No.2 Institute of Geo-environment Survey of Henan, Zhengzhou Henan 450053, Chin)

机构地区：[1]河南省地矿局第二地质环境调查院,河南郑州450053

出　　处：《探矿工程（岩土钻掘工程）》2018年第4期82-86,共5页Exploration Engineering:Rock & Soil Drilling and Tunneling

摘　　要：根据区域地质条件,郑州市地面沉降监测网基岩标建标场地选择在淮河西路与西三环交叉口东南600 m的河南省地质环境监测院内,建标深度为732m。地质鉴别孔孔深780m,孔径108mm,全孔取心钻进,施工的重点是保证岩心采取率,采用泥浆护壁回转钻进,根据钻进层位的岩性不同配置不同特性的泥浆;基岩标标孔孔深780m,孔径311mm,施工的控制目标是孔身质量和垂直度。采用三牙轮钻头宝塔式钻具组合不取心钻进施工工艺。取得了较好的施工质量,创造了良好的效益。According to the regional geological conditions,Zhengzhou Ground Subsidence Monitoring Network decided the building site with the setting depth of 732 m.The geological identification hole is 780 min depth with 108 mm in diameter,full hole coring drilling,the construction focuses on the core recovery,rotary drilling is adopted with mud protection,and according to the lithology in different drilling horizons,various mud are prepared.The bedrock mark hole is 780 min depth with 311 mm in diameter,the construction focuses on the borehole quality and verticality,full face drilling technology is adopted with three-cone bit and pagoda type BHA,good construction quality is achieved.

关 键 词：地面沉降监测 基岩标 地质鉴别孔 标孔 郑州市 

分 类 号：P634[天文地球—地质矿产勘探] P642.26[天文地球—地质学]